Apple has added two-factor authentication to iCloud and everything else connected to your Apple ID. This adds a nice boost to security for the service. Here's how to set it up.

Two-factor authentication is an easy way to secure your accounts and essentially makes it so you're logging in with two things: "something you know" (your password), and "something you have," (your phone). Here's how to enable it on your Apple ID:

Once it's set up you'll have to enter in both you password and the four digit code Apple sends you any time you want to make a purchase in iTunes, the App Store, or the iBookstore from a new device. Head over to Apple's support page if you have any problems setting it up.